i own a 2001 vw polo and the ecu and oil light keep comin on and the clocks stop working when oil light on . the car is at a vw garage as has been for months as they cant find the fault . we have changed ecu , crank sensor and cam sensor but still the same fault . the vw garage say it keeps comin back faulty speed sensor but we have changed it . they have tried making a new loom for the clocks , but it is still the same .the car runs fine when the garage delete the fault and take it on the test drive , but as soon as i get it home and turn it off and get back in it , the problem starts. im getting worried it cannot be fixed now. if anyone has any help or suggestions it would be much apprciated , john